Improvement in globe-valves



UNITED 'STATES PATENT .()EEIcEo JOHN N. MATLOOK, OF BROOKLYN, ASSIGNORTO BAKER, SMITH t OO., OF

NEW YORK, N. Y.

IMPROVEMENT IN GLOBE-VALVES.

Specii cation forming part of Letters Patent No. 158,296, dated December29, 1874; application filed December 2, 1874.

To all 'whom it may concern Be it known that I, JOHN N. MATLocK, ofBrooklyn, in the county of Kings and State of New York, have invented anImprovement in Globe-Valves, of which the following is a speciiication:

Globe-valves are usually employed in connection with steam and hot-waterapparatus, and under circumstances Where rubber or other elastic packingis difficult of application, because it is more or less softened orinjured by the heat; hence, great difficulty arises in keeping the valvetight, and when the metallic surfaces are brought into contact it hasheretofore been necessary to grind the valve to its seat. My presentinvention is made for dispensing with elastic packing, and for avoidingthe grinding ot' the Valve to its seat. I make use of a valve withannular grooves in its face, and the ribs between these grooves are of asize adapted to be pressed upon the flat or nearly flat seat, and toconform to the same by the pressure only, Without grinding; and this isthe result at any time, because the intervening ribs yield slightly tothe pressure, and accommodate any inequalities resulting from expansionof the metal under heat. In case of any foreign substance resting uponthe seat, the ribs will either cut the same or press it out of the Way.

In the drawing, Figure 1 is a vertical section of the globe-valve, andFig. 2 is an inverted plan of the valve.

The couplings a b, body c, cap cl, packinggland c, screwfstem f, andhand-Wheel g are ot' usual construction. The valve-seat h is ilat, ornearly so, and the valve t is loose at the end of the valve-stem, sothat the stein can turn after the valve touches the seat. The

surface of the valve is made With annular ribs.

and grooves, as shown, the ribs being sui-- ciently narrow to yield toany inequalities in the seat or surface of the rib; thereby the valveand seat Wear true, the one against the other, in consequence ot' thepressure, so that grinding is rendered unnecessary.

I claim as my invention- The valve t', made with a flat or nearly flatface, containing annular ribs and grooves, in combination with thescrew-stem f, flat seat h, and body c, as set forth.

Signed by me this 28th day of November, A. D. 1874.

Witnesses: JOHN N. MATLOOK.

WM. H. PosT, C. BAKER.

